Justin03sss Posted March 11, 2015 Report Share Posted March 11, 2015 My trans recently blew so I got one from a junkyard. While I was at it I installed a 3200 stall. Well everything was okay until today my cel came on. My truck leaves from a stop in 2nd gear and the tc won't lock up. The trans won't go in 1st manually either. The gear selector goes in but the PCM won't let it. I have a tune on the way Quote Link to comment Share on other sites More sharing options...
Justin03sss Posted March 11, 2015 Author Report Share Posted March 11, 2015 Just found this. Seems like what is going on. I'll let you guys know when my tune comes in. This may also help other people out. What is "limp-home mode" ? This is a fault mode in which the transmission either loses electrical power or the PCM deactivates all of the electronics. The transmission will default to max line pressure. The driver will have Reverse and 3rd, with manual 2nd available by putting the gearshift in 2 or 1 (doesn't matter). 1st, 4th, and TCC lockup will not be available. It will not hurt the car to drive it like this for short periods, but use manual 2nd to get the car moving, and be aware that the trans will generate more heat than normal while operating in limp-home mode due to increased torque converter slippage during 2nd gear starts and no lockup in 3rd gear. Quote Link to comment Share on other sites More sharing options...
canadianVRss Posted March 11, 2015 Report Share Posted March 11, 2015 Well that sucks. Why run it without a tune in the first place? It's kind of important with a mod like that. Quote Link to comment Share on other sites More sharing options...
Justin03sss Posted March 11, 2015 Author Report Share Posted March 11, 2015 I had no choice today ha. Hopefully it's in limp mode because of not being tuned for the stall. Quote Link to comment Share on other sites More sharing options...
Mcinalli123 Posted March 11, 2015 Report Share Posted March 11, 2015 The computer thinks one of the shift solenoids are stuck open And it puts the Trans in limp mode. Clear the codes it should shift until it sees the fault again it needs to be tuned. I wouldn't drive it until tuned to prevent damage The computer thinks one of the shift solenoids are stuck open And it puts the Trans in limp mode. Clear the codes it should shift until it sees the fault again it needs to be tuned. I wouldn't drive it until tuned to prevent damage Quote Link to comment Share on other sites More sharing options...
Justin03sss Posted March 12, 2015 Author Report Share Posted March 12, 2015 Exactly what I just found. PO757 is what code got thrown. My last transmission hesitated from 2-3 with oem convertor. Just changed transmissions and this one is doing the same 2-3 deal with the 3200 stall. Any ideas? Exactly what I just found. PO757 is what code got thrown. My last transmission hesitated from 2-3 with oem convertor. Just changed transmissions and this one is doing the same 2-3 deal with the 3200 stall. Any ideas? Quote Link to comment Share on other sites More sharing options...
Mcinalli123 Posted March 12, 2015 Report Share Posted March 12, 2015 If you clear the codes does it shift ok ? Quote Link to comment Share on other sites More sharing options...
Justin03sss Posted March 12, 2015 Author Report Share Posted March 12, 2015 It still has the 100rpm shift flare from 2-3 but not all the time. Only happens with soft acceleration Quote Link to comment Share on other sites More sharing options...
onebadmax Posted March 13, 2015 Report Share Posted March 13, 2015 That code has to be turned off (not reported) on some trucks. Your 3200 stall is definitely the culprit. Don't worry you should be just fine when you get your tune. You did mention the stall converter, right ;). Quote Link to comment Share on other sites More sharing options...
Justin03sss Posted March 13, 2015 Author Report Share Posted March 13, 2015 Yeah it was the only reason for my retune. Drives way better now with the tune Quote Link to comment Share on other sites More sharing options...
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